Will Wright made no bones about it. This was a casual game for casual people, they would have no trouble here:
"We were very focused, if anything, on making a game for more casual players. “Spore” has more depth than, let’s say, “The Sims” did. But we looked at the Metacritic scores for “Sims 2″, which was around 90, and something like “Half-Life“, which was 97, and we decided — quite a while back — that we would rather have the Metacritic and sales of “Sims 2″ than the Metacritic and sales of “Half-Life.
It was something that would always make non-casual gamers (If that’s even a decent approximation) make their piss boil, but this is the way it was always going to be.

Before I carry on with this review, I’ll make a sudden and possibly review breaking statement: I quite like it. Now let’s get to the bad stuff.
If you were idiotic/stupid/daft enough to buy the Creature Creator released a few months back for £5 then well done, you’ve officially signed your life over to EA. If you were smart enough to realise that a packet of fags and a cheap whore were more worthy of your fiver, then congratulations and welcome to the real world.
The Creature Creator, for those in the latter queue, is a fantastic tool, regardless of it’s pointlessness on it’s own. You can create almost anything your imagination can come up with, be it a hideous penis monster or a terrifying vagina beast, it’s all here. Every genital-based creature you can think of will come to life before your very eyes... Even non-genital based creatures are available for those with no imagination/religious beliefs (And if you are religious, why are you playing this game again?).
It’s truly amazing. It is. But it’s essentially as pointless within the game as it is pre-packaged in a £5 box. The creatures you create are, essentially, simply avatars once you reach the Tribal stage. But that’s 3 stages down the line, so let’s go back to the beginning, to when life first began...